Brightness enhancement of the AC Powder Electroluminescence Using ZnO nanorods

Countdown
0 days

Template for Manuscripts

Important Dates

Conference:

Aug. 18-20, 2018

Full Paper Due: Jul. 20, 2018

Abstract Due: Jul. 20, 2018

Audience Registration Due:
Aug. 18, 2018

Presentations of The Int'l Symposium on Photonics and Optoelectronics (SOPO 2016)

● Brightness enhancement of the AC Powder Electroluminescence Using ZnO nanorods
Author(s)
Qiyan Zhang
Affiliation(s)
Nagoya Institute of Technology
KEYWORDS
Brightness enhancement, AC Powder Electroluminescence, ZnO nanorods
ABSTRACT
The Powder electroluminescent (EL) device is a flat light emitting device which can be developed by a printing process. It is made up of a phosphor layer containing an inorganic phosphor and a dielectric layer containing a dielectric ceramic particles, and sandwiched between two plane electrodes[1]. In this study, we added the ZnO nanorods between the plane electrode and the phosphor layer, for the brightness enhancement of the device was observed. Structure of the EL device using ZnO nanorods is shown as fig.1. The ZnO seed layer was prepared by spin coating method on the ITO/quartz substrate. on the seed layer ZnO nanorods were grown by hydrothermal synthesis method. As a reference sample, a substrate of only ZnO seed layer was prepared. To fabricate the EL devices, first a phosphor layer and a dielectric layer were fabricated by spin coating on the respective substrate, then a back electrode of silver was formed by the vacuum deposition method. The observation of the ZnO nanorods and the seed layer was carried out by a scanning electron microscope (SEM). The measurement of the transmission spectrum was performed by UV-visible spectrophotometer. And the intensity of light emission was measured from the quartz substrate side. Voltage-Emission intensity characteristic of each EL devices are shown in the Fig.2. The frequency of the power supply is 60 Hz, and voltage is changed from 20V to 120V. The emission intensity of device with ZnO nanorods is observed to be enhanced compared to that with seed layer.